Write it down, draw it down, but it would be better if it's done on a nice illustrated notepad or notebook designed by well-known artists such as David Horvath (Bossy Bear, Uglydolls), Devilrobots (TO-FU, Maffy) or Mori Chack (Gloomy Bear).

Around 80 pages per Notebook, each page is lightly illustrated, so you have plenty of space to write down your memories.